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OceanStor 2200 V3 and 2600 V3 Storage System V300R005 SmartVirtualization Feature Guide 07

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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Configuration Process

Configuration Process

Before configuring the online takeover function, understand the configuration process to ensure a smooth configuration.

Figure 3-1 shows the configuration process.
Figure 3-1  Process for configuring online takeover

Table 3-1 describes specific operations for configuring online takeover, purposes of the operations, precautions, and devices on which the operations are operated.
Table 3-1  Each step of the configuration process

Configuration Process

Procedure

Description

Operation Position

Checking the license file

-

Before configuring the online takeover function, ensure that the license file contains the information about SmartVirtualization.
NOTE:

If heterogeneous storage systems are Huawei storage systems (excluding storage systems OEMed by Huawei), no license is required.

Local storage system

Performing a pre-configuration check

Check the application server.

  • Check whether services are running properly based on service types.
  • Check the health condition of the host multipathing software based on the software type and version.

Application server

Check the heterogeneous storage system.

Check whether the heterogeneous storage system is running properly.

Heterogeneous storage system

Check the local storage system.

Check whether the local storage system is running properly.

Local storage system

Connecting cables

-

  • Connect physical cables between the heterogeneous storage system and local storage system.
  • Connect physical cables between the local storage system and application servers.

Heterogeneous storage system, local storage system, and application servers

Establishing a logical connection between the heterogeneous storage system and local storage system

Establish Fibre Channel connections.

Configure a heterogeneous storage system.

Configure the heterogeneous storage system and map the LUNs of the storage system to the local storage system.

Heterogeneous storage system

Enable full automatic LUN scanning.

Full automatic LUN scanning enables all LUNs of the heterogeneous storage systems that have been mapped to the local storage system to be connected to the local storage system.

Local storage system

Establish iSCSI connections.

(Optional) Add a route.

When the heterogeneous storage system and local storage system reside on different network segments, these two storage systems can communicate correctly using a router.

Local storage system

Add a remote device.

You can discover the remote device that corresponds to the heterogeneous storage system in the local storage system by adding a remote device.

Local storage system

Configure a heterogeneous storage system.

Configure the heterogeneous storage system and map the LUNs of the storage system to the local storage system.

Heterogeneous storage system

Enable automatic LUN scanning.

You can connect the external LUNs in the heterogeneous storage system to the local storage system by enabling automatic LUN scanning.

Local storage system

Configuring and using eDevLUNs

(Optional) Create a storage pool.

Perform this operation when there is no storage pool or a storage pool is required to accommodate eDevLUNs in the local storage system.

Local storage system

Create eDevLUNs (with masquerading property).

Create eDevLUNs for external LUNs in storage pools of the local storage system and configure the LUN masquerading property of the eDevLUNs.

Local storage system

Map eDevLUNs to an application server.

Establish a mapping relationship between eDevLUNs and an application server so that the application server can identify the eDevLUNs.

  • Creating a LUN group: To achieve convenient management of multiple eDevLUNs, add the eDevLUNs that are created after the heterogeneous storage system is mapped to the local storage system for online takeover to a LUN group.
  • Creating a host and adding the initiator: Create a host that corresponds to the application server and establish a logical connection between the local storage system and application server by adding the initiator that corresponds to the application server's service port to the local storage system.
  • Creating a host group: To achieve convenient management of multiple hosts, add hosts to a host group.
  • Creating a mapping view: Create a mapping view and map the eDevLUNs to the application server.

Local storage system

Scan for eDevLUNs on the application server.

A scan triggers OceanStor UltraPath to update the information about the paths between the local storage system, heterogeneous storage system, and application server.

Application server

Configuring host path switchover

Check the multipathing status.

Check whether newly added paths are identified on an application server.

Application server

Switch over host paths.

  • If OceanStor UltraPath whose version is earlier than V100R008C20 is installed on an application server, remove the physical cables between the heterogeneous storage system and application server to switch over host paths.
  • If OceanStor UltraPath whose version is V100R008C20 or later is installed on an application server, run start migration to switch over host paths.
  • If third-party multipathing software is installed on an application server, see the document of the third-party multipathing software to obtain the command used for a host path switchover.
NOTE:

Operations may differ in the case when some heterogeneous storage systems are taken over online. For details, see Configuration Restrictions.

Application server

Migrate the reserved information.

Migrate the reserved information of a LUN from the heterogeneous storage system to the eDevLUN (that corresponds to the LUN) created in the local storage system.

Local storage system

Confirming host path switchover

Confirm the completion of the host path switchover.

Local storage system

Clearing the path switchover property of the eDevLUNs that are masqueraded

-

Clear the path switchover property of the eDevLUNs that are masqueraded and convert them into common LUNs so that the LUNs can be used in other online takeover tasks.

Local storage system

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Updated: 2018-12-29

Document ID: EDOC1000106155

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